Illinois State Route 90 is a main east-west highway in northern Peoria County. IL St Rt 90 passes through the following town in Peoria County. Princeville IL St Rt 90 is multi-plexed in Peoria County. Illinois State Route 91, near Princeville. IL St Rt 90 intersects the following highways in Peoria County. Illinois State Route 40, near Edelstein.
